How Often Should You Really Mow in Thunder Bay?

Every 5 to 7 days from late May through June, stretching to every 10 to 14 days once the heat of August sets in. That's the honest range for most Thunder Bay lawns. There's no single number that holds all season, because your grass isn't growing on a schedule. It's growing on rainfall, temperature, and daylight, all of which swing hard here between May and October.

Why "once a week" only works part of the year

In late May and June, Thunder Bay lawns are in their strongest growth flush of the year. Long daylight, cool nights, and steady spring moisture push grass up fast, often an inch or more in a week. Skip a cut and you're not just dealing with taller grass, you're removing more than a third of the blade at once, which stresses the lawn and leaves clippings thick enough to smother what's underneath. By late July and into August, growth slows on its own, especially in a dry stretch, and mowing weekly on a lawn that hasn't grown much just scalps it for no reason.

The one-third rule beats any calendar

The actual rule that matters: never cut off more than a third of the blade length in a single pass. If you keep your lawn at 3 inches, that means mowing again once it hits about 4.5 inches, whether that takes 5 days or 12. Watch the grass, not the date. If you're consistently seeing clumps of clippings on top of the lawn after a cut, you waited too long, and it's worth reaching for a rake or bagging that one pass so the thatch doesn't smother the grass underneath.

Cutting height matters as much as frequency

Set your mower to around 2.5 to 3 inches for most of the season. Taller grass shades its own roots, holds soil moisture better through our drier August stretches, and out-competes weeds. Scalping a lawn down to save a mow later just stresses it and opens the door to weeds and brown patches. If you're fighting weeds already, a taller, thicker lawn does more work than any product you can spray on it.

A rough month-by-month guide

• Late May to June: every 5 to 7 days. Peak growth, don't fall behind.
• July: every 7 to 10 days, longer if it's a dry stretch with no rain.
• August: every 10 to 14 days in a normal summer, weekly again if we get a wet spell.
• September into early October: back to every 7 to 10 days as cooler nights and fall moisture kick growth back up before the season ends.

Why we run weekly and biweekly routes

This is exactly why we offer both cadences instead of forcing everyone onto one schedule. Weekly visits at $50 keep pace with the spring and fall flushes without you having to think about it. Biweekly at $70 fits lawns that grow slower or owners who don't mind a bit more length between cuts. If you just need a one-time tidy-up before a long weekend or before listing your house, that's $100. Full details are on our lawn mowing page.

If your lawn still looks thin or patchy

Mowing frequency fixes overgrowth, but it won't fix compacted soil or thatch buildup underneath. If your lawn feels spongy or water pools instead of soaking in, that's usually a sign it needs aeration, not just a shorter mowing interval. We cover the full season, cutting height included, in our lawn care calendar.

Don't want to track any of this yourself?

We adjust our routes through the season so every lawn we cut gets mowed on the schedule it actually needs, not a fixed date that ignores the weather. Get a free quote and we'll set you up on weekly or biweekly, whichever fits your yard.